JP2008286419A - Air conditioning device - Google Patents

Air conditioning device Download PDF

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JP2008286419A
JP2008286419A JP2007128939A JP2007128939A JP2008286419A JP 2008286419 A JP2008286419 A JP 2008286419A JP 2007128939 A JP2007128939 A JP 2007128939A JP 2007128939 A JP2007128939 A JP 2007128939A JP 2008286419 A JP2008286419 A JP 2008286419A
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compressor
outdoor
air temperature
outdoor air
indoor
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Takayuki Izeki
貴之 井関
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Panasonic Corp
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Panasonic Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning device capable of preventing accumulation of liquid refrigerant in a compressor with an inexpensive constitution. <P>SOLUTION: In this air conditioning device where an outdoor machine 1 having the compressor 2 provided with a crank case 11, an outdoor heat exchanger 3, and an outdoor air temperature detecting device 10 detecting an outdoor air temperature, and an indoor machine 12 having an indoor heat exchanger 14 are connected with each other, power distribution to the crank case heater 11 is controlled according to the outdoor air temperature and a lapsed time from the stop of the compressor 2 in stopping the compressor 2, so that, for example, a time to the start of power distribution to the crank case heater 11 from the stop is shortened when the outdoor air temperature in stopping the compressor 2 is low, and a time to the start of power distribution to the crank case heater 11 from the stop is elongated (or not distribute power) when the outdoor air temperature in stopping the compressor 2 is high, thus the accumulation of liquid refrigerant inside of the compressor 2 can be effectively prevented, the compressor 2 is prevented from being damaged, and the reliability can be improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、空気調和装置に関するもので、特に、空気調和装置の制御に関するものである。   The present invention relates to an air conditioner, and more particularly to control of an air conditioner.

従来の空気調和装置は、圧縮機の温度が低下したときに、圧縮機内に液冷媒が溜まるのを防止する為、圧縮機のクランクケースに電気ヒータを取り付け、室外気温度に応じて、電気ヒータへの通電を制御して、低温時の液溜まりを防止すると共に消費電力を削減するようにしている(例えば、特許文献1参照)。
特開平10−30563号公報
In order to prevent liquid refrigerant from accumulating in the compressor when the temperature of the compressor is lowered, the conventional air conditioner has an electric heater attached to the crankcase of the compressor, and the electric heater according to the outdoor air temperature. Is controlled to prevent liquid accumulation at low temperatures and reduce power consumption (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-30563

しかしながら、上記従来の空気調和装置では、低外気温時の停止時に通電時間を制御することにより消費電力の低減やヒータの寿命延ばすことは可能だが、停止時間が短く、圧縮機に液冷媒が溜まる状態ではない場合でも通電してしまうのと、温度により通電量を変えられないために前述の効果が半減してしまったり、また室外機に常に通電する必要があり、待機電力が増大するなどの課題があった。   However, in the above conventional air conditioner, it is possible to reduce power consumption and extend the life of the heater by controlling the energization time when stopped at a low outside air temperature, but the stop time is short, and liquid refrigerant accumulates in the compressor. Even if it is not in a state, the energization amount cannot be changed depending on the temperature, so the above effect is reduced by half, and it is necessary to always energize the outdoor unit, increasing standby power, etc. There was a problem.

本発明は、前記従来の課題を解決するもので、効果的に圧縮機内部に液冷媒が溜まるのを防止し、消費電力を低減し、さらに電気ヒータの寿命を延ばすことができる空気調和装置を提供することを目的とする。   The present invention solves the above-described conventional problems, and an air conditioner that can effectively prevent liquid refrigerant from accumulating inside the compressor, reduce power consumption, and further extend the life of an electric heater. The purpose is to provide.

前記従来の課題を解決するために本発明の空気調和装置は、電気ヒータを設けた圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置、室外気温度を検出する室外気温度検出装置を有する室外機と、室内熱交換器、室内送風機を有する室内機とを接続し、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、前記圧縮機の停止時に、室外気温度と前記圧縮機の停止からの経過時間に応じて、前記電気ヒータへの通電を制御するようにしたもので、例えば、圧縮機停止時の室外気温度が低い場合は、停止から電気ヒータの通電を開始するまでの時間を短くし、圧縮機停止時の室外気温度が高い場合は、停止から電気ヒータの通電を開始するまでの時間を長く(或いは通電しない)するように制御すれば、効果的に圧縮機内部に液冷媒が溜まることを防止でき、圧縮機の損傷を防止して信頼性を向上させることができる。また、液冷媒が溜まらない場合(室外気温度が高い場合や室外気温度が低い場合でも停止からの時間が短い場合は)は、電気ヒータに通電しないようにすれば、消費電力が低減できるとともに、圧縮機周辺に配置された電気部品等の温度上昇の抑制や電気ヒータに通電することによる温度上昇による電気ヒータの寿命の低下を抑制でき、信頼性と寿命が向上する。   In order to solve the above-described conventional problems, an air conditioner of the present invention includes a compressor provided with an electric heater, an outdoor heat exchanger, an outdoor fan, a four-way valve, a throttle device, and an outdoor air temperature detection for detecting an outdoor air temperature. In an air conditioner that connects an outdoor unit having a device, an indoor heat exchanger, and an indoor unit having an indoor blower, and performs at least a cooling operation, a dehumidifying operation, or a heating operation, when the compressor is stopped, According to the elapsed time from the stop of the compressor, the energization to the electric heater is controlled. For example, when the outdoor air temperature when the compressor is stopped is low, the electric heater is energized from the stop. If the time to start is shortened and the outdoor air temperature when the compressor is stopped is high, it is effective to control so that the time from the stop to the start of energization of the electric heater is increased (or not energized). In It is possible to prevent the liquid refrigerant is accumulated in the internal compressor, damage to the compressor can be improved to reliable prevention. In addition, when liquid refrigerant does not accumulate (when the outdoor air temperature is high or when the outdoor air temperature is low, even when the time from the stop is short), power consumption can be reduced if the electric heater is not energized. In addition, it is possible to suppress the increase in the temperature of the electric parts and the like arranged around the compressor and the decrease in the service life of the electric heater due to the temperature increase caused by energizing the electric heater, thereby improving the reliability and the service life.

また、本発明の空気調和装置は、複数個の電気ヒータを設けた圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置、室外気温度を検出する室外気温度検出装置を有する室外機と、室内熱交換器、室内送風機を有する室内機とを接続し、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、前記圧縮機の停止時に、室外気温度と前記圧縮機停止からの経過時間に応じて、通電する前記電気ヒータの個数を変えるもので、例えば、圧縮機停止中の室外気温度が低い場合は、停止から電気ヒータの通電を開始するまでの時間を短くしかつ通電する電気ヒータの個数を増やし、圧縮機停止時の室外気温度が高い場合は、停止から電気ヒータの通電を開始するまでの時間を長くし(或いは
通電しない)かつ通電する個数を減らすようにすれば、効果的に圧縮機内部に液冷媒が溜まることを防止でき、圧縮機の損傷を防止して信頼性を向上させることができる。また、液冷媒が溜まらない場合(室外気温度が高い場合や室外気温度が低い場合でも停止からの時間が短い場合は)は電気ヒータに通電しないあるいは通電する個数を制限するようにすれば、消費電力が低減できるとともに、圧縮機周辺に配置された電気部品等の温度上昇の抑制や電気ヒータに通電することによる温度上昇による電気ヒータの寿命の低下を抑制でき、信頼性と寿命が向上する。
The air conditioner of the present invention is an outdoor unit having a compressor provided with a plurality of electric heaters, an outdoor heat exchanger, an outdoor fan, a four-way valve, a throttling device, and an outdoor air temperature detecting device for detecting the outdoor air temperature. In an air conditioner that connects an air conditioner and an indoor unit having an indoor heat exchanger and an indoor blower and performs at least a cooling operation, a dehumidifying operation, or a heating operation, when the compressor is stopped, the outdoor air temperature and the compressor stop The number of the electric heaters to be energized is changed according to the elapsed time from the start.For example, when the outdoor air temperature is low while the compressor is stopped, the time from the stop to the start of energization of the electric heater is shortened. And if the number of electric heaters to be energized is increased and the outdoor air temperature when the compressor is stopped is high, the time from the start to the start of energization of the electric heater is lengthened (or not energized) and the number of energized If so reduce, it is possible to prevent the liquid refrigerant accumulated inside effectively compressor, compressor damage can be improved to reliable prevention. If the liquid refrigerant does not accumulate (if the outdoor air temperature is high or the outdoor air temperature is low, even if the time from the stop is short), if the electric heater is not energized or the number of energized electricity is limited, The power consumption can be reduced, and the temperature rise of electrical parts and the like arranged around the compressor can be suppressed, and the decrease in the life of the electric heater due to the temperature rise caused by energizing the electric heater can be improved, improving the reliability and life. .

本発明の空気調和装置は、効果的に圧縮機内部に液冷媒が溜まることを防止でき、圧縮機の損傷を防止して信頼性を向上することができる。また、消費電力が低減できるとともに、圧縮機周辺に配置された電気部品等の温度上昇の抑制や電気ヒータに通電することによる温度上昇による電気ヒータの寿命の低下を抑制でき、信頼性と寿命が向上する。   The air conditioner of the present invention can effectively prevent liquid refrigerant from accumulating inside the compressor, prevent damage to the compressor, and improve reliability. In addition to reducing power consumption, it is possible to suppress the rise in temperature of electrical components placed around the compressor and the reduction in the life of the electric heater due to the rise in temperature caused by energizing the electric heater. improves.

第1の発明は、電気ヒータを設けた圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置、室外気温度を検出する室外気温度検出装置を有する室外機と、室内熱交換器、室内送風機を有する室内機とを接続し、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、前記圧縮機の停止時に、室外気温度と前記圧縮機の停止からの経過時間に応じて、前記電気ヒータへの通電を制御するようにしたもので、例えば、圧縮機停止時の室外気温度が低い場合は、停止から電気ヒータの通電を開始するまでの時間を短くし、圧縮機停止時の室外気温度が高い場合は、停止から電気ヒータの通電を開始するまでの時間を長く(或いは通電しない)するように制御すれば、効果的に圧縮機内部に液冷媒が溜まることを防止でき、圧縮機の損傷を防止して信頼性を向上させることができる。また、液冷媒が溜まらない場合(室外気温度が高い場合や室外気温度が低い場合でも停止からの時間が短い場合は)は、電気ヒータに通電しないようにすれば、消費電力が低減できるとともに、圧縮機周辺に配置された電気部品等の温度上昇の抑制や電気ヒータに通電することによる温度上昇による電気ヒータの寿命の低下を抑制でき、信頼性と寿命が向上する。   A first invention includes a compressor provided with an electric heater, an outdoor heat exchanger, an outdoor blower, a four-way valve, a throttling device, an outdoor unit having an outdoor air temperature detecting device for detecting outdoor air temperature, and an indoor heat exchanger In an air conditioner that connects an indoor unit having an indoor blower and performs at least a cooling operation, a dehumidifying operation, or a heating operation, when the compressor is stopped, the outdoor air temperature and the elapsed time from the compressor stop are For example, when the outdoor air temperature when the compressor is stopped is low, the time from the stop to the start of energization of the electric heater is shortened. If the outdoor air temperature at the time of stoppage is high, it is possible to effectively accumulate liquid refrigerant inside the compressor by controlling so that the time from the stop to the start of energization of the electric heater is lengthened (or not energized). Can prevent To prevent damage to the compressor can be improved in reliability. In addition, when liquid refrigerant does not accumulate (when the outdoor air temperature is high or when the outdoor air temperature is low, even when the time from the stop is short), power consumption can be reduced if the electric heater is not energized. In addition, it is possible to suppress the increase in the temperature of the electric parts and the like arranged around the compressor and the decrease in the service life of the electric heater due to the temperature increase caused by energizing the electric heater, thereby improving the reliability and the service life.

第2の発明は、複数個の電気ヒータを設けた圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置、室外気温度を検出する室外気温度検出装置を有する室外機と、室内熱交換器、室内送風機を有する室内機とを接続し、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、前記圧縮機の停止時に、室外気温度と前記圧縮機停止からの経過時間に応じて、通電する前記電気ヒータの個数を変えるもので、例えば、圧縮機停止中の室外気温度が低い場合は、停止から電気ヒータの通電を開始するまでの時間を短くしかつ通電する電気ヒータの個数を増やし、圧縮機停止時の室外気温度が高い場合は、停止から電気ヒータの通電を開始するまでの時間を長くし(或いは通電しない)かつ通電する個数を減らすようにすれば、効果的に圧縮機内部に液冷媒が溜まることを防止でき、圧縮機の損傷を防止して信頼性を向上させることができる。また、液冷媒が溜まらない場合(室外気温度が高い場合や室外気温度が低い場合でも停止からの時間が短い場合は)は電気ヒータに通電しないあるいは通電する個数を制限するようにすれば、消費電力が低減できるとともに、圧縮機周辺に配置された電気部品等の温度上昇の抑制や電気ヒータに通電することによる温度上昇による電気ヒータの寿命の低下を抑制でき、信頼性と寿命が向上する。   A second invention includes a compressor provided with a plurality of electric heaters, an outdoor heat exchanger, an outdoor blower, a four-way valve, a throttling device, an outdoor unit having an outdoor air temperature detecting device for detecting an outdoor air temperature, In an air conditioner that connects a heat exchanger and an indoor unit having an indoor blower and performs at least a cooling operation, a dehumidifying operation, or a heating operation, when the compressor is stopped, the outdoor air temperature and the elapsed time from the compressor stop The number of electric heaters to be energized is changed according to the electric current. For example, when the outdoor air temperature is low while the compressor is stopped, the time from the stop to the start of energization of the electric heater is shortened and If the number of heaters is increased and the outdoor air temperature is high when the compressor is stopped, the time from when the compressor is stopped until the start of energization of the electric heater is lengthened (or not energized) and the number of energized power is decreased. If, it is possible to prevent the liquid refrigerant accumulated inside effectively compressor, compressor damage can be improved to reliable prevention. If the liquid refrigerant does not accumulate (if the outdoor air temperature is high or the outdoor air temperature is low, but the time from the stop is short), do not energize the electric heater or limit the number of energization, The power consumption can be reduced, and the temperature rise of electrical parts and the like arranged around the compressor can be suppressed, and the decrease in the life of the electric heater due to the temperature rise caused by energizing the electric heater can be improved, improving the reliability and life. .

第3の発明は、特に、第1又は第2の発明の室内機に、空気調和装置の運転停止時に、室外気温度に応じて室外機への通電を制御するリレー回路を設けたもので、例えば、室外気温度がかなり高い場合は、室外機への通電をやめることにより、停止時の待機電力が削減できる。   The third invention is provided with a relay circuit for controlling the energization of the outdoor unit according to the outdoor air temperature when the operation of the air conditioner is stopped, particularly in the indoor unit of the first or second invention. For example, when the outdoor air temperature is quite high, the standby power at the time of stopping can be reduced by stopping energization of the outdoor unit.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、本実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(実施の形態1)
図1は、本発明の実施の形態1における空気調和装置の冷凍サイクル図であり、図2は、同空気調和装置のフローチャートである。
(Embodiment 1)
FIG. 1 is a refrigeration cycle diagram of the air-conditioning apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a flowchart of the air-conditioning apparatus.

図1において、本実施の形態における空気調和装置の室外機1には、電気ヒータであるクランクケースヒータ11を設けた圧縮機2と、室外熱交換器3と、室外送風機4と、冷媒液管5aと、冷媒ガス管6aと、冷暖房切換用の四方弁7と、絞り装置8が設けられている。また、室外機1には、室外熱交換器3の温度を検出する室外熱交換器温度検出装置9と室外気温を検出する室外気温度検出装置10が設けられている。   In FIG. 1, an outdoor unit 1 of an air conditioner in the present embodiment includes a compressor 2 provided with a crankcase heater 11 that is an electric heater, an outdoor heat exchanger 3, an outdoor blower 4, and a refrigerant liquid pipe. 5a, the refrigerant gas pipe 6a, the four-way valve 7 for switching between heating and cooling, and the expansion device 8 are provided. The outdoor unit 1 is provided with an outdoor heat exchanger temperature detection device 9 that detects the temperature of the outdoor heat exchanger 3 and an outdoor air temperature detection device 10 that detects the outdoor air temperature.

一方、室内機12には、室内送風機13と、室内熱交換器14と、室内熱交換器14の温度を検出する室内熱交換器温度検出装置15と、部屋の室温を検出する室内吸込み温度検出装置16と、居住者が希望する運転モード(冷房、除湿または暖房)、室温、運転あるいは停止、風量及び風向などを設定できる運転設定装置17が設けられている。そして、室外機1と室内機12とは接続配管5b、6bで接続されて、冷凍サイクルが構成されている。   On the other hand, the indoor unit 12 includes an indoor blower 13, an indoor heat exchanger 14, an indoor heat exchanger temperature detection device 15 that detects the temperature of the indoor heat exchanger 14, and an indoor suction temperature detection that detects the room temperature of the room. A device 16 and an operation setting device 17 capable of setting an operation mode (cooling, dehumidification or heating) desired by the occupant, room temperature, operation or stop, air volume and direction are provided. And the outdoor unit 1 and the indoor unit 12 are connected by the connection piping 5b and 6b, and the refrigerating cycle is comprised.

上記冷凍サイクルにおいて、冷房あるいは除湿運転時、圧縮機2から吐出された冷媒は四方弁7を介して室外熱交換器3へと流れ、室外送風機4により室外熱交換器3で室外空気と熱交換して凝縮液化し、次に、冷媒液管5aを通って絞り装置8を通過することにより減圧された冷媒は、室内熱交換器14で蒸発した後に、冷媒ガス管6aを通り四方弁7を介して再び圧縮機2に吸入される。   In the refrigeration cycle, during cooling or dehumidifying operation, the refrigerant discharged from the compressor 2 flows to the outdoor heat exchanger 3 through the four-way valve 7, and exchanges heat with outdoor air by the outdoor heat exchanger 3 by the outdoor fan 4. The refrigerant that has been condensed and liquefied and then depressurized by passing through the expansion device 8 through the refrigerant liquid pipe 5a evaporates in the indoor heat exchanger 14, passes through the refrigerant gas pipe 6a, and passes through the four-way valve 7. Then, the air is sucked into the compressor 2 again.

暖房運転時は、圧縮機2から吐出された冷媒は、四方弁7を介して室内熱交換器14へと流れ、室内送風機13により、室内熱交換器14で室内空気と熱交換して凝縮液化し、次に絞り装置8を通過することにより減圧された冷媒は、室外熱交換器3で蒸発した後に、四方弁7を介して再び圧縮機2に吸入される。   During the heating operation, the refrigerant discharged from the compressor 2 flows to the indoor heat exchanger 14 via the four-way valve 7, and the indoor blower 13 exchanges heat with indoor air in the indoor heat exchanger 14 to condense and liquefy. Then, the refrigerant depressurized by passing through the expansion device 8 evaporates in the outdoor heat exchanger 3 and then is sucked into the compressor 2 again through the four-way valve 7.

次に、本実施の形態における空気調和装置の制御について図2のフローチャートを用いて説明する。   Next, control of the air conditioner in the present embodiment will be described with reference to the flowchart of FIG.

図2において、居住者が、運転設定装置17で冷房、除湿または暖房を選択し運転を開始後、停止すると(S2)すると、停止からの時間TimeSの計数を開始し(S3)、室外気温度Thoutがある設定値1より高い場合は(ここでは、例えばThout≧20℃)(S5)、クランクケースヒータ11に通電を行わない。室外気温度Thoutがある設定値2より低い場合は(ここでは、例えば、Thout<−10℃)(S6)、圧縮機2の停止からある設定時間1(ここでは、例えば3時間)経過後に(S7)、クランクケースヒータ11に通電する(S8)。室外気温度Thoutがある設定値2より高く、ある設定値3より低い場合は(ここでは、例えば−10℃≦Thout<0℃)(S9)、圧縮機2の停止からある設定時間2(ここでは、例えば8時間)経過後に(S10)、クランクケースヒータ11に通電する(S11)。   In FIG. 2, when the resident selects cooling, dehumidification or heating with the operation setting device 17 and starts operation and then stops (S2), the time TimeS from the stop is counted (S3), and the outdoor air temperature When Thout is higher than a certain set value 1 (here, for example, Thout ≧ 20 ° C.) (S5), the crankcase heater 11 is not energized. When the outdoor air temperature Thout is lower than a set value 2 (here, for example, Thout <−10 ° C.) (S6), after a certain set time 1 (here, 3 hours, for example) has elapsed since the compressor 2 stopped ( S7), the crankcase heater 11 is energized (S8). When the outdoor air temperature Thout is higher than a certain set value 2 and lower than a certain set value 3 (here, for example, −10 ° C. ≦ Thout <0 ° C.) (S9), a certain set time 2 (here, from the stop of the compressor 2) Then, for example, after 8 hours have elapsed (S10), the crankcase heater 11 is energized (S11).

室外気温度Thoutがある設定値3より高く、ある設定値1より低い場合は(ここでは例えば0℃≦Thout<20℃)(S12)、圧縮機2の停止からある設定時間3(ここでは、例えば12時間)経過後に(S13)、クランクケースヒータ11に通電する(S14)。圧縮機2が運転を開始すると、クランクケースヒータ11への通電を解除す
る。
When the outdoor air temperature Thout is higher than a certain setting value 3 and lower than a certain setting value 1 (here, for example, 0 ° C. ≦ Thout <20 ° C.) (S12), a certain setting time 3 (here, from the stop of the compressor 2) For example, after 12 hours have elapsed (S13), the crankcase heater 11 is energized (S14). When the compressor 2 starts operation, the power supply to the crankcase heater 11 is released.

以上のように本実施の形態によれば、圧縮機2の停止時の室外気温度が低い場合は、停止からクランクケースヒータ11への通電を開始するまでの時間を短くすることにより、効果的に圧縮機2内部に液冷媒が溜まることを防止でき、圧縮機2の損傷を防止して信頼性を向上させることができる。   As described above, according to the present embodiment, when the outdoor air temperature when the compressor 2 is stopped is low, it is effective by shortening the time from when the compressor 2 is stopped until the crankcase heater 11 is energized. In addition, liquid refrigerant can be prevented from accumulating in the compressor 2, and damage to the compressor 2 can be prevented to improve reliability.

また、液冷媒が溜まらない場合(室外気温度が高い場合や室外気温度が低い場合でも停止からの時間が短い場合は)は、クランクケースヒータ11に通電しないことにより消費電力が低減できるとともに、圧縮機2周辺に配置された電気部品等の温度上昇の抑制や、クランクケースヒータ11への通電による温度上昇による、クランクケースヒータ11の寿命の低下を抑制でき、信頼性と寿命が向上する。   In addition, when the liquid refrigerant does not accumulate (when the outdoor air temperature is high or the outdoor air temperature is low, even when the time from the stop is short), power consumption can be reduced by not energizing the crankcase heater 11, It is possible to suppress the rise in the temperature of the electric parts and the like arranged around the compressor 2 and the reduction in the life of the crankcase heater 11 due to the temperature rise due to the energization of the crankcase heater 11, and the reliability and life are improved.

なお、ここでは、室外気温度で圧縮機2の温度を代用し制御しているが、直接圧縮機2の外郭に温度検出装置(図示せず)を取りつけても良いし、圧縮機2の吐出温度で判断しても同様の効果がある。   Here, the temperature of the compressor 2 is controlled instead of the outdoor air temperature, but a temperature detection device (not shown) may be directly attached to the outer shell of the compressor 2 or the discharge of the compressor 2 Even if judged by temperature, the same effect is obtained.

(実施の形態2)
図3は、本発明の実施の形態2における空気調和装置の冷凍サイクル図であり、図4は、同空気調和装置のフローチャートである。上記第1の実施の形態における空気調和装置と同一部分については、同一符号を付して、その説明を省略する。
(Embodiment 2)
FIG. 3 is a refrigeration cycle diagram of the air-conditioning apparatus according to Embodiment 2 of the present invention, and FIG. 4 is a flowchart of the air-conditioning apparatus. About the same part as the air conditioning apparatus in the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

本実施の形態における空気調和装置は、圧縮機2に、出力が異なる複数の電気ヒータとして、クランクケースヒータ11a、11bを設けたもので、他の構成は、上記第1の実施の形態における空気調和装置と同一である。   The air conditioner in the present embodiment is provided with crankcase heaters 11a and 11b as a plurality of electric heaters with different outputs in the compressor 2, and the other configuration is the air in the first embodiment. It is the same as the harmony device.

次に、本実施の形態における空気調和装置の制御について、図4のフローチャートを用いて説明する。   Next, the control of the air conditioner in the present embodiment will be described using the flowchart of FIG.

図4において、居住者が、運転設定装置17で冷房、除湿または暖房を選択し運転を開始後、停止すると(S2)すると、停止からの時間TimeSの計数を開始し(S3)、室外気温度Thoutが、ある設定値1より高い場合は(ここでは、例えばThout≧20℃)(S5)、クランクケースヒータ11a、11bのいずれにも通電を行わない。   In FIG. 4, when the resident selects cooling, dehumidification or heating with the operation setting device 17 and starts the operation and then stops (S2), the time TimeS from the stop is counted (S3), and the outdoor air temperature When Thout is higher than a certain set value 1 (here, for example, Thout ≧ 20 ° C.) (S5), neither of the crankcase heaters 11a and 11b is energized.

室外気温度Thoutが、ある設定値2より低い場合は(ここでは、例えばThout<−10℃)(S6)、圧縮機2の停止からある設定時間1(ここでは、例えば3時間)経過後に(S7)、クランクケースヒータ11a、11bに通電する(S8)。   When the outdoor air temperature Thout is lower than a certain set value 2 (here, for example, Thout <−10 ° C.) (S6), after a certain set time 1 (here, 3 hours, for example) has elapsed since the compressor 2 stopped ( S7), the crankcase heaters 11a and 11b are energized (S8).

室外気温度Thoutがある設定値2より高く、ある設定値3より低い場合は(ここでは例えば−10℃≦Thout<−0℃)(S9)、圧縮機2の停止からある設定時間2(ここでは、例えば8時間)経過後に(S10)、クランクケースヒータ11bに通電する(S11)。室外気温度Thoutがある設定値3より高く、ある設定値1より低い場合は(ここでは、例えば0℃≦Thout<20℃)(S12)、圧縮機2の停止からある設定時間3(ここでは、例えば、12時間)経過後に(S13)、クランクケースヒータ11aに通電する(S14)。そして、圧縮機2が運転を開始すると、クランクケースヒータ11a、11bへの通電を解除する。   When the outdoor air temperature Thout is higher than a certain set value 2 and lower than a certain set value 3 (here, for example, −10 ° C. ≦ Thout <−0 ° C.) (S9), a certain set time 2 (here, from the stop of the compressor 2) Then, for example, after 8 hours (S10), the crankcase heater 11b is energized (S11). When the outdoor air temperature Thout is higher than a certain set value 3 and lower than a certain set value 1 (here, for example, 0 ° C. ≦ Thout <20 ° C.) (S12), a certain set time 3 (here, from the stop of the compressor 2) For example, after 12 hours have elapsed (S13), the crankcase heater 11a is energized (S14). When the compressor 2 starts operation, the energization to the crankcase heaters 11a and 11b is released.

また、本実施の形態では、クランクケースヒータ11bの出力は、クランクケースヒータ11aより高く設定している。たとえば、クランクケースヒータ11aの出力は20Wで、クランクケースヒータ11bの出力は30Wである。   In the present embodiment, the output of the crankcase heater 11b is set higher than that of the crankcase heater 11a. For example, the output of the crankcase heater 11a is 20W, and the output of the crankcase heater 11b is 30W.

以上のように本実施の形態によれば、圧縮機2の停止中の室外気温度が低い場合は、停止から電気ヒータ(クランクケースヒータ11a、11b)への通電を開始するまでの時間を短くし、かつ通電する電気ヒータの個数を増やし、効果的に圧縮機2内部に液冷媒が溜まることを防止することができ、圧縮機2の損傷を防止して信頼性を向上させることができる。   As described above, according to the present embodiment, when the outdoor air temperature when the compressor 2 is stopped is low, the time from when the compressor 2 is stopped to when energization to the electric heaters (crankcase heaters 11a and 11b) is started is shortened. In addition, the number of electric heaters to be energized can be increased, and liquid refrigerant can be effectively prevented from accumulating inside the compressor 2, and damage to the compressor 2 can be prevented and reliability can be improved.

また、液冷媒が溜まらない場合(室外気温度が高い場合や、室外気温度が低い場合でも停止からの時間が短い場合は)は、電気ヒータに通電しない、あるいは通電する出力を制限する(ここでは通電する電気ヒータの個数をかえる)ことにより、消費電力が低減できるとともに、圧縮機2の周辺に配置された電気部品等の温度上昇の抑制や、電気ヒータへの通電による温度上昇による、電気ヒータの寿命の低下を抑制でき、信頼性と寿命が向上する。なお、ここでは、室外気温度で圧縮機2の温度を代用し制御しているが、直接圧縮機2の外郭に温度検出装置(図示せず)を取りつけても良いし、圧縮機2の吐出温度で判断しても同様の効果がある。   If the liquid refrigerant does not accumulate (when the outdoor air temperature is high or the outdoor air temperature is low and the time from the stop is short), the electric heater is not energized or the energized output is limited (here In this case, the power consumption can be reduced by changing the number of the electric heaters to be energized), and the electric temperature can be reduced by suppressing the temperature rise of the electric parts arranged around the compressor 2 and by the temperature rise by energizing the electric heater. Reduction in heater life can be suppressed, and reliability and life can be improved. Here, the temperature of the compressor 2 is controlled instead of the outdoor air temperature, but a temperature detection device (not shown) may be directly attached to the outer shell of the compressor 2 or the discharge of the compressor 2 Even if judged by temperature, the same effect is obtained.

(実施の形態3)
図5は、本発明の実施の形態3における空気調和装置の制御ブロック図、図6は、同空気調和機のフローチャートである。尚、本実施の形態における空気調和装置の冷凍サイクル図は、上記実施の形態2における空気調和装置と同一なので、同一部分には、同一符号を付してその説明を省略する。
(Embodiment 3)
FIG. 5 is a control block diagram of the air conditioner according to Embodiment 3 of the present invention, and FIG. 6 is a flowchart of the air conditioner. In addition, since the refrigerating cycle diagram of the air conditioner in the present embodiment is the same as the air conditioner in the second embodiment, the same portions are denoted by the same reference numerals and the description thereof is omitted.

本実施の形態における空気調和装置の制御について図5、6を用いて説明する。   Control of the air conditioning apparatus in the present embodiment will be described with reference to FIGS.

図5、6において、本実施の形態における空気調和装置の室内制御装置18には、居住者が希望する運転モード切替スイッチ19(冷房、除湿または暖房)と、室内温度設定スイッチ20と、運転停止スイッチ21と、風量設定スイッチ22と、風向設定スイッチ23とで構成されている運転設定装置17の信号と、室内熱交換器温度検出装置15と、室内吸込み温度検出装置16の信号と、室外機1からの信号をサンプリング時間毎に受けて室内送風機13等の運転を決定する判定装置24と、判定装置24の信号により、室内送風機13等の駆動や室外機1への信号(電圧やデータ)を制御するするリレー回路25と、室外機1との信号の送受信を行う信号送受信装置26を有している。   5 and 6, the indoor control device 18 of the air conditioner according to the present embodiment includes an operation mode changeover switch 19 (cooling, dehumidification or heating) desired by the occupant, an indoor temperature setting switch 20, and an operation stop. The signal of the operation setting device 17 constituted by the switch 21, the air volume setting switch 22, and the air direction setting switch 23, the signal of the indoor heat exchanger temperature detection device 15, the signal of the indoor suction temperature detection device 16, and the outdoor unit 1 is received at every sampling time to determine the operation of the indoor fan 13 and the like, and the signal of the indoor fan 13 and the signal (voltage and data) to the outdoor unit 1 is driven by the signal of the determination device 24. And a signal transmission / reception device 26 for transmitting / receiving signals to / from the outdoor unit 1.

本実施の形態における空気調和装置の室外制御装置27には、室外熱交換器温度検出装置9と、室外気温度検出装置10の信号と、室内機12からの信号をサンプリング時間毎に受けて室外送風機4、圧縮機2、絞り装置8、4方弁7、クランクケースヒータ11a、11bの運転を決定する判定装置28と、判定装置28の信号により、室外送風機4、圧縮機2、絞り装置8、4方弁7、クランクケースヒータ11a、11b等の駆動や室内への信号(電圧やデータ)を制御するするリレー回路29と、室内機12との信号の送受信を行う信号送受信装置30を有している。   The outdoor control device 27 of the air conditioner in the present embodiment receives the signals of the outdoor heat exchanger temperature detection device 9, the outdoor air temperature detection device 10, and the signal from the indoor unit 12 every sampling time. The blower 4, the compressor 2, the expansion device 8, the four-way valve 7, the determination device 28 for determining the operation of the crankcase heaters 11a, 11b, and the outdoor blower 4, the compressor 2, the expansion device 8 according to the signal of the determination device 28. A relay circuit 29 that controls driving of the four-way valve 7 and the crankcase heaters 11a and 11b, and indoor signals (voltage and data), and a signal transmitting and receiving device 30 that transmits and receives signals to and from the indoor unit 12 are provided. is doing.

図6において、居住者が、運転設定装置17で冷房、除湿または暖房を選択し運転を開始後、停止すると(S2)すると、停止からの時間TimeSの計数を開始し(S3)、室外気温度Thoutがある設定値1より高い場合は(ここでは、例えば、Thout≧20℃)(S5)、リレー回路25をオープンにし、室外機1への通電をOFFする(S6)。   In FIG. 6, when the resident selects cooling, dehumidification or heating with the operation setting device 17 and starts the operation and then stops (S2), the time TimeS from the stop is counted (S3), and the outdoor air temperature When Thout is higher than a set value 1 (here, for example, Thout ≧ 20 ° C.) (S5), the relay circuit 25 is opened and the energization to the outdoor unit 1 is turned off (S6).

室外気温度Thoutがある設定値2より低い場合は(ここでは、例えば、Thout<−10℃)(S7)、圧縮機2の停止からある設定時間1(ここでは、例えば、3時間)経過後に(S8)、クランクケースヒータ11a、11bに通電する(S9)。   When the outdoor air temperature Thout is lower than a set value 2 (here, for example, Thout <−10 ° C.) (S7), after a set time 1 (here, 3 hours, for example) has elapsed since the compressor 2 stopped. (S8) Energize the crankcase heaters 11a and 11b (S9).

室外気温度Thoutが、ある設定値2より高く、ある設定値3より低い場合は(ここでは、例えば−10℃≦Thout<−0℃)(S10)、圧縮機2の停止からある設定時間2(ここでは、例えば、8時間)経過後に(S11)、クランクケースヒータ11bに通電する(S12)。   When the outdoor air temperature Thout is higher than a certain set value 2 and lower than a certain set value 3 (here, for example, −10 ° C. ≦ Thout <−0 ° C.) (S10), a certain set time 2 from the stop of the compressor 2 After (e.g., 8 hours) has elapsed (S11), the crankcase heater 11b is energized (S12).

室外気温度Thoutがある設定値3より高く、ある設定値1より低い場合は(ここでは、例えば、0℃≦Thout<20℃)(S13)、圧縮機2の停止からある設定時間3(ここでは、例えば、12時間)経過後に(S14)、クランクケースヒータ11aに通電する(S15)。圧縮機2が運転を開始すると、クランクケースヒータ11a、11bの通電を解除する。   When the outdoor air temperature Thout is higher than a certain setting value 3 and lower than a certain setting value 1 (here, for example, 0 ° C. ≦ Thout <20 ° C.) (S13), a certain setting time 3 (here, from the stop of the compressor 2) Then, for example, after 12 hours have elapsed (S14), the crankcase heater 11a is energized (S15). When the compressor 2 starts operation, the energization of the crankcase heaters 11a and 11b is released.

また、クランクケースヒータ11bの出力は、クランクケースヒータ11aのそれより高く設定されている。ここでは、例えば、クランクケースヒータ11aの出力は20W、クランクケースヒータ11bの出力は30Wである。   The output of the crankcase heater 11b is set higher than that of the crankcase heater 11a. Here, for example, the output of the crankcase heater 11a is 20W, and the output of the crankcase heater 11b is 30W.

以上のように、本実施の形態によれば、圧縮機2の停止中の室外気温度がかなり高い場合は、室外機1への通電をやめることにより、停止時の待機電力が削減できる。また室外気温度が低い場合は、停止から、電気ヒータ(クランクケースヒータ11a、11b)への通電を開始するまでの時間を短くしかつ通電する電気ヒータの個数を増やし、圧縮機2の停止時の室外気温度が少し高い場合は、停止から電気ヒータの通電を開始するまでの時間を長くしかつ通電する個数を減らすことにより、効果的に圧縮機2の内部に液冷媒が溜まることを防止でき、圧縮機2の損傷を防止して信頼性を向上させることができる。   As described above, according to the present embodiment, when the outdoor air temperature during the stop of the compressor 2 is considerably high, the standby power during the stop can be reduced by stopping the energization of the outdoor unit 1. When the outdoor air temperature is low, the time from the stop to the start of energization of the electric heaters (crankcase heaters 11a and 11b) is shortened and the number of energized electric heaters is increased. When the outdoor air temperature is slightly high, the liquid refrigerant is effectively prevented from accumulating inside the compressor 2 by lengthening the time from the stop to the start of energization of the electric heater and reducing the number of energizations. It is possible to prevent damage to the compressor 2 and improve reliability.

また、液冷媒が溜まらない場合(室外気温度が少し高い場合や室外気温度が低い場合でも停止からの時間が短い場合は)は、通電する電気ヒータの個数を制限することにより、消費電力が低減できるとともに、圧縮機2の周辺に配置された電気部品等の温度上昇の抑制や電気ヒータへの通電による温度上昇による電気ヒータの寿命の低下を抑制でき、信頼性と寿命が向上する。   If the liquid refrigerant does not accumulate (if the outdoor air temperature is slightly high or the outdoor air temperature is low, but the time from the stop is short), the power consumption can be reduced by limiting the number of energized electric heaters. While being able to reduce, the temperature rise of the electrical components etc. which are arrange | positioned around the compressor 2 and the fall of the lifetime of the electric heater by the temperature rise by the electricity supply to an electric heater can be suppressed, and reliability and a lifetime are improved.

なお、ここでは室外気温度で圧縮機2の温度を代用し制御しているが、直接圧縮機2の外郭に温度検出装置(図示せず)を取りつけても良いし、圧縮機2の吐出温度で判断しても同様の効果がある。   Although the temperature of the compressor 2 is controlled instead of the outdoor air temperature here, a temperature detection device (not shown) may be directly attached to the outer wall of the compressor 2, or the discharge temperature of the compressor 2 The same effect can be obtained even if judged by

以上のように本発明にかかる空気調和装置は、圧縮機へのヒータ通電量を制御し圧縮機内部への液冷媒の溜まりを防止しているので、多室型空気調和装置にも応用できる。   As described above, the air conditioner according to the present invention controls the heater energization amount to the compressor and prevents liquid refrigerant from accumulating inside the compressor, and therefore can be applied to a multi-chamber air conditioner.

本発明の実施の形態1における空気調和装置の冷凍サイクル図Refrigeration cycle diagram of the air-conditioning apparatus according to Embodiment 1 of the present invention 同空気調和装置のフローチャートFlow chart of the air conditioner 本発明の実施の形態2における空気調和装置の冷凍サイクル図Refrigeration cycle diagram of the air-conditioning apparatus according to Embodiment 2 of the present invention 同空気調和装置のフローチャートFlow chart of the air conditioner 本発明の実施の形態3における空気調和装置の制御ブロック図Control block diagram of air-conditioning apparatus in Embodiment 3 of the present invention 同空気調和装置のフローチャートFlow chart of the air conditioner

符号の説明Explanation of symbols

1 室外機
2 圧縮機
3 室外熱交換器
4 室外送風機
7 四方弁
8 絞り装置
10 室外気温度検出装置
11、11a、11b クランクケースヒータ(電気ヒータ)
12 室内機
13 室内送風機
14 室内熱交換器
25 リレー回路
DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Compressor 3 Outdoor heat exchanger 4 Outdoor blower 7 Four-way valve 8 Throttle device 10 Outdoor air temperature detection device 11, 11a, 11b Crankcase heater (electric heater)
12 Indoor Unit 13 Indoor Blower 14 Indoor Heat Exchanger 25 Relay Circuit

Claims (3)

電気ヒータを設けた圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置、室外気温度を検出する室外気温度検出装置を有する室外機と、室内熱交換器、室内送風機を有する室内機とを接続し、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、前記圧縮機の停止時に、室外気温度と前記圧縮機の停止からの経過時間に応じて、前記電気ヒータへの通電を制御するようにしたことを特徴とする空気調和装置。 Compressor provided with electric heater, outdoor heat exchanger, outdoor blower, 4-way valve, throttle device, outdoor unit having outdoor air temperature detecting device for detecting outdoor air temperature, indoor heat exchanger, indoor having air blower An air conditioner that performs at least a cooling operation, a dehumidifying operation, or a heating operation, when the compressor is stopped, depending on an outdoor air temperature and an elapsed time since the compressor is stopped, to the electric heater An air conditioner characterized by controlling energization of the air. 複数個の電気ヒータを設けた圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置、室外気温度を検出する室外気温度検出装置を有する室外機と、室内熱交換器、室内送風機を有する室内機とを接続し、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、前記圧縮機の停止時に、室外気温度と前記圧縮機停止からの経過時間に応じて、通電する前記電気ヒータの個数を変えることを特徴とする空気調和装置。 Compressor provided with a plurality of electric heaters, outdoor heat exchanger, outdoor blower, 4-way valve, throttle device, outdoor unit having outdoor air temperature detecting device for detecting outdoor air temperature, indoor heat exchanger, indoor blower In an air conditioner that is connected to an indoor unit having at least a cooling operation, a dehumidifying operation, or a heating operation, energization is performed according to an outdoor air temperature and an elapsed time since the compressor is stopped when the compressor is stopped. An air conditioner characterized by changing the number of the electric heaters. 室内機に、空気調和装置の運転停止時に、室外気温度に応じて室外機への通電を制御するリレー回路を設けたことを特徴とする請求項1又は2に記載の空気調和装置。 The air conditioner according to claim 1 or 2, wherein the indoor unit is provided with a relay circuit for controlling energization to the outdoor unit according to the outdoor air temperature when the operation of the air conditioner is stopped.
JP2007128939A 2007-05-15 2007-05-15 Air conditioning device Pending JP2008286419A (en)

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US9903627B2 (en) 2012-11-06 2018-02-27 Carrier Corporation Method of operating an air conditioning system including reducing the energy consumed by the compressor crank case heaters
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CN109579229A (en) * 2018-10-30 2019-04-05 青岛海信日立空调系统有限公司 A kind of air conditioner compressor preheating control method and air conditioner

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